"Luggage" is stuff like suitcases, bags, and cases that you take with you when you travel somewhere.

The word "luggage" is uncountable, so people don't normally say "luggages." Other related words, like "suitcase", are countable:

I find it hard to believe that you're really going to need that many suitcases for just 3 days.

This phrase appears in these lessons: